Switching matrix for telecommunication exchanges

Details Switching matrix for telecommunication exchanges Switching matrix for telecommunication exchanges

1989-04-21

1991-03-19

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

307467, 3408259, H04Q 100, H04Q 300

Patent

active

050014749

ABSTRACT:
A switch matrix for telecommunication including change-over switches which can be used for both analog and digital signal transmission. Each change-over switch includes a selector circuit, an input and an output stage. The output stage generally includes two transistors coupled in a push-pull arrangement which are connected directly to the supply voltage allowing the capacitive load of the switch to be charged or discharged rapidly. Also, the Miller effect of the internal base-collector capacitance is absent. Consequently, a large frequency range (to approximately 3 GHz) is realized for analog use, and a switch rate of approximately 2 Gb/s is attainable for digital use.

REFERENCES:
patent: 3550088 (1970-12-01), Jones
patent: 4346381 (1982-08-01), Bauch et al.
patent: 4553044 (1985-11-01), Bittner
K. B. Klaassen et al., "A Fast Unilateral Monolithic Switch for Analog Signals", IEEE Journal of Solid-State Circuits, Apr. 1978, vol. SC-13, No. 2, pp. 158-261.

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